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A. E. OOLGATB. SECONDARY BATTERY.

Patented July 26, 1892.

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UNrrs .STATES ATENT OFFICE.

ARTHUR E. OOLGATE, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO LOlYELL MASON, OF SAME PLACE.

SECON DARY BATTERY.

SPECIFICATION forming part of Letters Patent No. 479,753, dated July 26, 1892.

Application filed April 26, 1892 To all whom it may concern,.-

Be it known that I, ARTHUR E. OOLGATE, a citizen of the United States, residing at New York, in the county and State of New York, have invented certain new and useful Improvements in Secondary Batteries, of which the following is a specification, reference being had to the drawings accompanying and forming apart of the same.

Myinvention is an improvement in secondary batteries or accumulators, and relates,

mainly, to the plates or elements of the same of what is commonly known as the Plante type. Extensive tests, both experimental and`practical, have induced me to adopt the following as the best and most practicable plan of manufacturing and preparing my improved plates: I rst cut out or produce in any well-known manner long, narrow, and comparatively thin strips or ribbons of metallic lead or other suitable material, with numerous rows of perforations through the same, disposed in any desired manner, but usually in transverse lines or rows. These strips or ribbons are then corrugated, and while the direction or character of the corrugations is not particularly material I'prefer them to be longitudinal. Generally I make two or three ridges or corrugations in a ribbon three-sights to half an inch in width. The corrugated and perforated ribbons are then twisted like a strand of yarn, but rather loosely, and only so as to convert them into approximately round strands. The strands thus prepared I weave in any desired manner into a band or series of plates, adopting usually in this step or stage of manufacture the ordinary plan pursued in producing battery plates of interwoven strips or strands, as heretofore practiced. After the lead fabric yhas been produced in suflicient quantity, and generally in mats or plates slightly larger than is required of the finished plates, but of approximately the same shape, I lay two, three, or more of such mats upon one another and subject them to moderate pressure, whereby compound plates will be formed and suf1iciently compacted to hold together in ordinary handling. The plates are then shaped by trimming their edges and usually by melt- Serial No. 430,717. (No model.)

'ing or fusing the edges by a blow-pipe iiame to a much greater extent, I believe, than has ever been accomplished heretofore. Various plans for this have been followed or proposed. Some plates have been made porous and others have been made up of strands, ribbons, or finely-divided particles or masses of lead; but none have possessed, so far as I am aware, the following special and distinguishing characteristics of my improved plate, all of which, it will readily understood by those skilled in the art, possess peculiar and valuable advantages. 'Ihe individual strands, each of which is in metallic connection with the frame by being fused directly to the same, are twisted so as to reduce to a minimum the exterior surface covered or protected from the electrolyte by adjacent strands. The area of interior active surface of each strand is moreover increased by the corrugations and the direct access of the electrolyte alforded by the loose Winding or twisting of the fiat strips or ribbons and through the perforations.

In ord er to define in certain particulars what I regard as included in my invention, I would state that I may use strands varying widely in cross-section and may use plates composed of a single mat or layer, woven IOC rated lead strip or ribbon. Fig. 2 exhibits the same with the corrugations therein. Fig. 3 showsa short length of the perforated corrugated ribbon or strip twisted and ready for weaving into a fabric. Fig. 4 is a side view of a portion of a woven plate and frame. Fig. 5 is a cross-section of the same. Fig. 6 is a perspective view ot' an insulating-frame used for separating two adjacent plates in a cell. Fig. 7 is an edge view of two plates and the interposed frame.

A indicates the lead strip; B, the perforations therein; C, the corrugations; D, the lead frame; E, an ear extending from each frame as a terminal; F, perforations through the frame for the bolts that bind the plates together, and G the insulating-frame that separates the plates.

Having made up the plates, as above described,they are placed together with the insulating-frames G between them and fastened by bolts or other means. The frames G are corrugated or perforated or similarly formed to permit a free circulation of the electrolyte through them and between the plates. When complete, the battery is charged and used in the ordinary manner.

What I claim as of my invention is- 1. A plate for secondary batteries, consisting of an assemblage of strands composed of fiat strips or ribbons of lead twisted in the manner described.

2. A plate for secondary batteries, consisting of an assemblage of strands composed of fiat strips or ribbons of lead, corrugated and twisted in the manner described.

3. A plate for secondary batteries, consisting of an assemblage of strands composed of lead strips perforated and twisted, as described.

4. A plate for secondary batteries, consisting of an assemblage of strands composed of lead strips perforated, corrugated, and twisted, as set forth.

5. A plate for secondary batteries, consisting of a woven lead fabric, the strands of which are composed of lead strips perforated, corrugated, and twisted, as set forth.

6. The combination, with a lead frame provided with a terminal, of a woven fabric of perforated, corrugated, and twisted lead strands contained Within said frame and having its edges fused to the same, as set forth.

7. The combination, with two or more secondary-battery plates composed of lead frames surroundinga woven lead fabric, of interposed corrugated insulating-frames for separating the plates and permitting the circulation of the electrolyte between them, as set forth.

ARTHUR E. OOLGATE.

Witnesses:

PARKER W. PAGE, M. G. TRACY. 

